AndyD Posted July 25, 2018 Share Posted July 25, 2018 as any body had any dealings with the 30cc 4 stroke,ive had the 38cc one which is not the smoothest of engines but not to bad but the 30 I can only find negative comments mainly due to carb issues.i don't want to put a 2 stroke in my pup if I can help it but if this engines not up to it I might have to as OS and Saito are out of my price range at the moment,although I might wait another year if I have to. Quote Link to comment Share on other sites More sharing options...
cymaz Posted July 25, 2018 Share Posted July 25, 2018 Try reading this. Very comprehensive...make your own mind up. Edited By cymaz on 25/07/2018 19:14:03 Quote Link to comment Share on other sites More sharing options...
Don Fry Posted July 25, 2018 Share Posted July 25, 2018 I've got one of the 25 cc 2 strokes. Now, while not knocking it, it doesn't inspire confidence. Installed inverted, I wondered if the attachment of the plug cap to the motor was 100%. But it runs OK. But there was one suspicious dead stick. It's a cheap motor. Worth a good airframe? By the bye, Laser might be doing a 30 cc petrol 4 stoke by the time you save your pennies. Quote Link to comment Share on other sites More sharing options...
AndyD Posted July 25, 2018 Author Share Posted July 25, 2018 im not convinced on the engine as I also had the 35 rear exhaust 2nstroke that seized after only a hours running so it looks like the saito or os unless Jon gets the lazer sorted.but I can see the lazer selling out as soon as its announced ,so os or saito im leaning towards os but I don't think theres much in it and both twice the price of the ngh Quote Link to comment Share on other sites More sharing options...
Jon H Posted July 25, 2018 Share Posted July 25, 2018 I will post an update on the Laser thread to bring everyone up to speed. As for the NGH, I have only had limited experience with the 38 but the 30 looks better on the surface. Never seen one go though Quote Link to comment Share on other sites More sharing options...
AndyD Posted July 25, 2018 Author Share Posted July 25, 2018 1st choice would be laser followed by OS and third saito because ive been seeing saito 30s are having possible carb problems where they keep quiting. Quote Link to comment Share on other sites More sharing options...
Ron Gray Posted July 25, 2018 Share Posted July 25, 2018 For what it’s worth, I’ve got a 38, it’s noisy, dirty and underpowered but great value for money. I’ve been told that retiming the engine makes a marked improvement to the power and noise (Propguy - NGH38 auto start). Quote Link to comment Share on other sites More sharing options...
onetenor Posted July 25, 2018 Share Posted July 25, 2018 Re timing what, valves,ignition,both? Quote Link to comment Share on other sites More sharing options...
Ron Gray Posted July 26, 2018 Share Posted July 26, 2018 Ignition Quote Link to comment Share on other sites More sharing options...
Alve Hansson Posted July 26, 2018 Share Posted July 26, 2018 About ten starts with the NGH GF30 in my Spacewalker and yet no problem. Seems to be a good engine but not as strong as my OS GF30 but the NGH GF30 Provides the most horsepower for the money. Quote Link to comment Share on other sites More sharing options...
Jon H Posted July 26, 2018 Share Posted July 26, 2018 what sort of revs do you see on the ngh 30? Quote Link to comment Share on other sites More sharing options...
Alve Hansson Posted July 26, 2018 Share Posted July 26, 2018 The revs with a JM 17X8 is about 7600 with factory setting on the carburator, will maybe be a little better after full break in and tuning of the carburator. My OS GF30 and a APC 17X8 is about 1000 revs more. Quote Link to comment Share on other sites More sharing options...
Jon H Posted July 26, 2018 Share Posted July 26, 2018 Posted by Alve Hansson on 26/07/2018 09:16:09: The revs with a JM 17X8 is about 7600 with factory setting on the carburator, will maybe be a little better after full break in and tuning of the carburator. My OS GF30 and a APC 17X8 is about 1000 revs more. Our 155 hits almost 8k on a 17x8 apc. The 180 is a bit faster at around 8200 but as a long stroke engine it wont rev like the OS. Its more interested in 18 an 20 inch props. According to this review **LINK** the saito fg30 does 8k on the 17x8 so even if our 180 spits out just over 8000 its still in the ballpark on the 'small' props. Quote Link to comment Share on other sites More sharing options...
Alve Hansson Posted July 26, 2018 Share Posted July 26, 2018 Question: Will Laser 155 and 180 gas engine have needle roller bearings on the conrod like other (except Saito) four stroke gas engine? Sorry, we were going to discuss NGH GF30 in this topic. Edited By Alve Hansson on 26/07/2018 12:04:06 Quote Link to comment Share on other sites More sharing options...
AndyD Posted July 26, 2018 Author Share Posted July 26, 2018 its nice to have all these comparisons.i might take a chance on the ngh as its only going in a cheap sports scale pup until I start the scale one. Quote Link to comment Share on other sites More sharing options...
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